PCA

sift特征点检测及匹配，matlab源码(sift feature point detection and matching, matlab source code)

说明：  Wallis滤波可以有效去除影像的不均匀光照现象，因此使用Wallis滤波进行阴影去除算法(a kind of shadow removal algorithm which combining with Wallis filter)

在保证图像质量的前提下，为了提高可逆信息隐藏的容量，提出了一种基于差值扩 展的可逆信息隐藏新算法(The premise of guaranteeing the image quality, in order to improve the reversible capacity of information hiding, a difference expansion based on new algorithm for reversible information hiding)

这是最经典的平面图像质量评价的ssim实现，算法实现简单。(image quality assessment)

Porcupine deals with digital image watermarking. You can embed any visible watermark like a text or another image in any position, or store information invisibly inside using a secret key (password).

图像匹配，可以实现目标图像的匹配，匹配出最相似的训练图片。(Image matching, the matching can achieve the target image, matching the most similar training images.)

基于拓展RPC模型的多源卫星遥感影像几何处理 转化程序(RPC model-based development of multi-source remote sensing image processing conversion process geometry)

水下图像的matlab程序，FCM水下图像聚类及图像增强matlab代码，非常有用(Underwater image matlab procedures, FCM underwater image clustering and image enhancement matlab code, very useful)

使用了色调映射算法，调整图片的灰度，更好表达原图里的信息与特征。(The hue mapping algorithm is used to adjust the gray level of the image and better express the information and features in the original image.)

数字图像哈弗曼编码，包括压缩和解压。压缩比、信噪比(Encoded digital image Hafu Man)